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  4. In chloroplast, the site for initial photochemical reaction is

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Q. In chloroplast, the site for initial photochemical reaction is

NTA AbhyasNTA Abhyas 2022

Solution:

The light reaction takes place in the thylakoid discs, where water (H2O) is oxidized, and oxygen (O2) is released. The electrons freed up from the water are transferred to ATP and NADPH. The dark reaction takes place in the stroma (aqueous fluid surrounding the stacks of thylakoids.